Sieve-belt for sewage



(No Model.-)

A. P. BLACK. SIEVE BELT FOR SEWAGE. No. 443,743. Patented-Dc. 30, 1890.

Fl I l HVEHTIJFQ 2 V NITED STATES ATENT FFICE.

ASHER F. BLACK, OF MALDEN, MASSACHUSETTS.

SIEVE-BELT FOR SEWAGE.

SPECIFICATION forming part of Letters Patent No. 443,743, dated December30, 1890.

Application filed June 2, 1890. Serial No. 554,059. (No model.)

To all whom. it may concern:

Be it known that I, ASHER F. BLACK, of Malden, in the county ofMiddlesex and State of Massachusetts, have invented a new and usefulImprovement in Sieve-Belts for Sewage, of which the following, taken inconnection with the accompanying drawings, is a specification.

My invention relates to a device for treating sewage-water-that is, thatpart of sewage that is fluid and that contains noxious matter either insolution or in a very finelydivided state and carried in suspension, thetreatment being to cause the sewage-Water to be sprayed through largequantities of pure air. The air, acting upon the finely-divideddescending spray of sewage, oxidizes and otherwise works upon it andrenders its noxious elements comparatively harmless.

My invention consists in forming a spraysieve belt by using flatmetallic strips for the filling and wire for the warp, the edges of thebelt being made strong by the aid of small wire cables, the wholearranged for the purpose of causing the water or other fluid that passesthrough it to fall in a spray, in which condition it is rapidly aerated.

The accompanying drawings illustrate my device, of which- Figure 1 showsone of my spray-belts and the supporting-pulleys. Fig. 2 is a plan view,much reduced, of a part of one of my sievebelts, and is intended toillustrate the method of forming the parts and connecting them together.

Hereto'fore devices used for aeration of sewage have consisted ofvarious forms of agitators or stirrers and of weirs or dams for thesewage to flow over, also pumps have been used to cause the sewage tofall through the air from quite a height; but these devices, as well asthe ordinary sieve, have failed from the fact that the fluid has notbeen sufficiently sprayed. My device has an advantage over all of these,inasmuch as it completely sprays the fluid and puts it in the bestpossible condition for aeration.

I will now describe my device.

In Fig. l the belt A is shown as passing over two pulleys B. Thesepulleys are of such form as to cause the belt to be troughshaped orconcave on its upper side, so that the water will have a tendency toflow toward the middle, so that if water is supplied in quantity toogreat to pass at once through the belt then the excess will flow towardthe center, when, if it accumulates to a slight degree and having moredepth, it will run through the belt much faster than it does at theedges. If the belt were flat, the excess of water would run off theedges and not be sprayed sufficiently for receiving rapid aeration. Thepart of the belt that passes over the pulleys B is deflected by otherpulleys or rollers, (not shown) so that it is not directly under thepart that receives the fluid to be sprayed.

I construct my belt as follows: A warp 1s formed of two edge cables ofwire, one of which is shown at D, Fig. 2, and of a series of wires \V\V. Interwoven with this wire W W, I have thin flexible metallic strips0 O. This method of forming the sieve-belt leaves openings K K of such anature that a fluid in passing through will not fall directly down, butwill be deflected, and the resulting streams will conflict with eachother, producing a spray, which effect is quite different from theeffect produced by fluid passing through an ordinary sieve-that is, mybelt produces a spray, while the ordinary sievebelt simply strains theliquid and allows it to reunite after passing through the meshes, and tofall in a solid stream thatis not sprayed at all, and not in conditionto be purified or aerated. I

The openings II II, made at or near the warp wires 'W, serve to increasethe spraying qualities of the belt, as they, being located near thelowest part of each section, will serve to check the union of thestreams that flow from the openings K K, and otherwise have a tendencyto increase the spraying action of the belt.

I claim- 1. In an aerating device, a spray-sieve belt consisting of aseries of flat metallic strips held in place by wires and arranged,substantially as described, so as to leave openings K K, as and for thepurpose set forth.

2. In an aerating device, a spray-sieve belt consisting of a series offlat metallic strips held in place by wires, each strip havingperforations H H, substantially as and for the purpose set forth.

ASHER F. BLACK. Witnesses:

FRANK W. ALDEN, FRANK M. BROWN.

